It should hold the vacuum when closed (no voltage) and open fully when voltage is applied see below. The purge valve is typically tested with a hand-held vacuum pump. It opens when voltage is applied to its terminals. If no obvious problem is found, the purge valve needs to be tested next. How the code p0441 is diagnosed: Without a scan-tool: The first part is to check visually for obvious problems: if the gas cap closed properly, there is no cracks or other damage on the charcoal canister and all vacuum hoses related to the EVAP system are properly connected. open or short in the purge valve control wiring cracked or clogged EVAP VSV vacuum hoses (Toyota) vacuum leak near the purge line /engine intake connection Other than the Check Engine light, there might be no driveability symptoms or the engine may surge or run a little rough at idle. The purge flow is controlled by the purge valve (purge solenoid). The code P0441 means that the purge flow is lower or higher than it should be. When you drive and certain conditions (speed, engine temperature, etc.) are met, fuel vapors are gradually purged from the charcoal canister and burned inside your engine. The EVAP system catches and stores gasoline vapors in a small box installed near the fuel tank called charcoal canister. The Evaporative control system (EVAP) prevents gasoline vapors from the fuel tank from escaping into the atmosphere. The code P0441 means that the Evaporative control system purge flow is incorrect. Home > Check Engine light > P0441 P0441 Evaporative Emission Control System Signs of automatic transmission problems. How to check the engine when buying a used car.How to get the best deal on a used car?.Buying a Used Car: 10 Common Mistakes to Avoid.
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